Commit-ID: 011dccbdd93b7022c5c67e7c55fa8b5030b5e03d Gitweb: http://git.kernel.org/tip/011dccbdd93b7022c5c67e7c55fa8b5030b5e03d Author: Jiri Olsa <jo...@kernel.org> AuthorDate: Fri, 21 Nov 2014 10:31:07 +0100 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Mon, 24 Nov 2014 18:03:50 -0300
perf evsel: Introduce perf_evsel__read_cb function Adding perf_evsel__read_cb read function that retuns count values via callback. It will be used later in stat command as single way to retrieve counter values. Signed-off-by: Jiri Olsa <jo...@kernel.org> Cc: Andi Kleen <a...@linux.intel.com> Cc: Corey Ashford <cjash...@linux.vnet.ibm.com> Cc: David Ahern <dsah...@gmail.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Ingo Molnar <mi...@kernel.org> Cc: Matt Fleming <matt.flem...@intel.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Paul Mackerras <pau...@samba.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/r/1416562275-12404-4-git-send-email-jo...@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/util/evsel.c | 16 ++++++++++++++++ tools/perf/util/evsel.h | 7 +++++++ 2 files changed, 23 insertions(+) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 6dc7a67..2d26b7a 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -917,6 +917,22 @@ void perf_counts_values__scale(struct perf_counts_values *count, *pscaled = scaled; } +int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, + perf_evsel__read_cb_t cb) +{ + struct perf_counts_values count; + + memset(&count, 0, sizeof(count)); + + if (FD(evsel, cpu, thread) < 0) + return -EINVAL; + + if (readn(FD(evsel, cpu, thread), &count, sizeof(count)) < 0) + return -errno; + + return cb(evsel, cpu, thread, &count); +} + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale) { diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 7af0377..5c93bed 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -233,6 +233,13 @@ static inline bool perf_evsel__match2(struct perf_evsel *e1, (a)->attr.type == (b)->attr.type && \ (a)->attr.config == (b)->attr.config) +typedef int (perf_evsel__read_cb_t)(struct perf_evsel *evsel, + int cpu, int thread, + struct perf_counts_values *count); + +int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, + perf_evsel__read_cb_t cb); + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
